If you are a camera or computer user, you may come into an occasion in which someone accidentally deleted or formatted your files in SD card or hard drive. Next thing you know is that your drive becomes empty. Do not panic! There are many ways to restore them completely FREE, even they are no longer seen in Recycle Bin or the drive itself.
Since I started using PC, I had helped countless persons in fresh reinstalling their Windows due to various problems (e.g. virus attacks, corrupted hard disk, slow system, etc). Of course, Windows will not be perfect without some essential software. Other than Microsoft Office which is a commercial product, I usually help them install some lightweight freeware which can be useful for their daily usage.